"I got a call from [magazine founder Hugh Hefner's] attorney who said, 'We don't want anybody else. There's nobody else, could you do the last cover of Playboy?'" she revealed to "Entertainment Tonight."

When she told Brandon she'd be posing nude, she said his response was, "We're older, we're not embarrassed anymore of you. You know, we think you're great."

The star added, "He was so excited...He may have high-fived me...And then I asked Dylan too, and Dylan's like, 'Mom, you know you've done it all.' I don't know what to say but, they were really excited for me, and I was excited too."

She was so excited, she couldn't wait to strip down for her final shoot

"I took off all my clothes, and I rolled down the hill as fast as I can," she told "ET." "I was just screaming, and hair and boobs were flying, and shoes were going everywhere, and they and Ellen [Von Unwerth] shot it."

It's a far cry from the first time Anderson posed for the iconic magazine.

The former Playmate told actor James Franco for the magazine's final nude edition, "The photographer shot me in one roll of film because I was nervous and throwing up. But then I saw the pictures, and from there it was hard to keep my clothes on! I was painfully shy before, but then it clicked in my head that nobody cares what you look like naked except you."

Playboy announced in October that that it will no longer feature nudity, though it will continue to publish. The magazine, established by Hugh Hefner, has featured sexy centerfolds and unclothed celebrities since its 1953 debut, serving as a key driver of the sexual revolution.